Swag ing-machine



'* lln'rrnn stares LATENT OFFICE.

lVILLlAM I-I. DAYTON, OF TORRINGTON, CONNECTICUT.

SWAGING- MACHINE.

SPECIFICATION forming part of Letters Patent No. 408,294, dated August6, 1889.

Application filed November 24, 1888. Serial No. 291,829. (No model.)

To all whom it may concern.-

Be it known that I, VILLIAM H. DAYTON, of Tlorrington, in the county ofLitchiield and State of Connecticut, have invented an Improvement inSwaging-Machines, of which the following is a specification.

Letters Patent have heretofore been granted to me for a machine in whichthere is a revolving head upon a tubular mandrel, and this revolvinghead is within a stationary circular shell, there being a row of rollersbetween the revolving head and the interior of the circular shell, andin the revolving head there is a transverse channel containing dies anddie-stocks, the outer ends of the stocks coming into contactsuccessively with the rollers and forcing the dies toward each other forswaging the rod, wire, or other article placed between the inner groovedends of the dies, and these grooves in the inner ends of these dies arehalf-circles, that flare outwardly or are trumpet-shaped at the entranceside for the rod or wire, and a swaging-machine of this character willbe seen in Letters Patent Nos. 268,874, December 12, 1882, and 376,144,January 10, 1888.

In using this machine I have experienced a difficulty resulting from theflaring or trumpet-mouth portion of the dies tending to force the rod orwire baekwardly; hence the reduction in the size of the rod can only bevery gradual; otherwise the inclined action of the dies is so powerfulthat the attendant cannot prevent the rod being moved backwardly.

The object of my present invention is to prevent the rod being forcedbackwardly'as the dies are closed, and to make the feeding operationself-acting or automatic, if so desired, and to allow for a greaterreduction for each compression than in the swaging-machines heretoforeused.

In the drawings, Figure 1 is a vertical sec tion of the two dies madeuse of by me, on an enlarged scale. Fig. 2 is an elevation of the thedies C C and followers 0 C. These dies C C are to be grooved in theiradjacent inner faces, and this groove is the segment of a circle, ornearly so, in each die, and it flares or tapers outwardly at theentrance side; but instead of the surfaces of the grooves being smooth,as heretofore usual, I make use of internal corrugations, as shown at 22, so that said corrugations act to indent the metal of the rod or wireas the reductions are being made, and the inclined or flaring portion ofthe die will not slide upon or force back the tapering or conicalportion of the rod or wire that is being reduced. Thereby thecompressing action of the dies will be rapid and uniform, and theattendant has simply to press the rod or wire toward the dies as theyrevolve or swage or reduce the metal to the proper size for passing intoorthrough the dies.

that these dies C and the head N are revolved by power, and the dies arealternately opened and closed. If, therefore, the corrugations 2 uponthe flaring portions of the dies are inclined similar to screw-threads,the revolution of the head and dies causes such dies to act like a screwto drawin the rod as it is reduced, and thereby the feed of the wire ismade antomatic, the rod not being revolved, but simply held in the handof the attendant as it is passed endwise into the machine. There islittle or no tendency of the screw-threaded dies to revolve the rod orwire, because such dies open easily and slide over the conical portionsof the wire where the reduction is taking place between one compressingaction and the next. It is to be understood that these corrugations,whether peripheral or screw-formed, may die out or be removed beforereaching the portions of the dies that finish the surface of the reducedwire or red, as seen in Fig. 1, so that the surface of thefinishedarticle is not corrugated or injured; but where the reduction isrequired to be Very rapid and the finish upon the surface of the reducedportion of the rod or wire is immaterial-such, for instance, as in thepointing of rods'to be drawn through dies-the corrugations or ribs mayextend more or less into the portions of the dies where the opening isof It will be observed by the aforesaid patent i the smallest diameter.This is illustrated in Fig. 3, where the opening between the dies istapering and the inclined or screw-thread corrugations extend allthrough the dies.

I claim as my invention- 1. The reducing or swaging dies havingcorrugations or ribs at the conical or flaring portion of the openingbetween the dies, substantially as set forth.

2. The swaging or reducing dies having an opening through between themand provided with screw-threaded ribs or corrugations in the surface ofthe metal at the tapering portion of the opening, substantially as setforth.

3. The combination, with the revolving head N, having a transversegroove, of the dies C within such groove, there being a central openingthrough between the said dies,

-which opening is tapering or flaring at the entrance side for thearticle to be operated matically by the revolution of the dies, sub- 25stantially as set forth.

Sign ed by me this 3d day of November, 1888.

W. H. DAYTON. Vitnesses:

ISAAC W. BRooKs, JOHN N. BROOKS.

